/*
* Copyright (c) 2012 Kyle Hayward
* 
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* 
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
* 
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "Precompiled.h"

#include "Program.h"
#include "Context.h"
#include "Variable.h"

using namespace System;

namespace OptixDotNet 
{
	Program::Program( Context^ context, String^ filename, String^ programName ) : OptixNode( context )
	{
		mProgram = 0;

		if( String::IsNullOrEmpty( filename ) || String::IsNullOrEmpty( filename ) )
			throw gcnew Exception( "Program Error: Null or Empty filename or program name" );

		const char* file = (const char*)StrToAnsii( filename );
		const char* progName = (const char*)StrToAnsii( programName );
		
		pin_ptr<RTprogram> ptr = &mProgram;
		CheckError( rtProgramCreateFromPTXFile( context->InternalPtr(), file, progName, ptr ) );
	}

	Program::Program( Context^ context, RTprogram program ) : OptixNode( context )
	{
		mProgram = program;
	}

	Variable^ Program::default::get( String^ s )
	{
		if( String::IsNullOrEmpty( s ) )
			throw gcnew Exception( "Program Error: Variable name is null or empty" );

		const char* str = (const char*)StrToAnsii( s );
		
		RTvariable rtVar;
		CheckError( rtProgramQueryVariable( mProgram, str, &rtVar ) );

		if( rtVar == 0 ) 
			CheckError( rtProgramDeclareVariable( mProgram, str, &rtVar ) );

		return gcnew Variable( mContext, rtVar );
	}

	void Program::default::set( String^ s, Variable^ var )
	{
		if( String::IsNullOrEmpty( s ) )
			throw gcnew Exception( "Program Error: Variable name is null or empty" );

		const char* str = (const char*)StrToAnsii( s );

		RTvariable rtVar;
		CheckError( rtProgramQueryVariable( mProgram, str, &rtVar ) );

		if( rtVar != 0 && var == nullptr )
		{
			CheckError( rtProgramRemoveVariable( mProgram, rtVar ) );
		}
		else
		{
			throw gcnew Exception( "Program Error: Variable copying not yet implemented" );
		}
	}

	Variable^ Program::default::get( int index )
	{
		if( index < 0 || index >= VariableCount )
			throw gcnew ArgumentOutOfRangeException( "index" );
		
		RTvariable rtVar;
		CheckError( rtProgramGetVariable( mProgram, index, &rtVar ) );

		return gcnew Variable( mContext, rtVar );
	}

	void Program::default::set( int index, Variable^ var )
	{
		if( index < 0 || index >= VariableCount )
			throw gcnew ArgumentOutOfRangeException( "index" );

		RTvariable rtVar;
		CheckError( rtProgramGetVariable( mProgram, index, &rtVar ) );

		if( var == nullptr )
		{
			CheckError( rtProgramRemoveVariable( mProgram, rtVar ) );
		}
		else
		{
			throw gcnew Exception( "Program Error: Variable copying not yet implemented" );
		}
	}
}